Most contact lenses prescribed for correction of refractive error are not meant to be used while sleeping. There are just a few kinds that may be used but those are generally for specific diseases and the prescribing ophthalmologist informs the patient if that is the case. in your situation, the redness and glare you are experiencing is due to extended wear of regular kinds of lenses. The cornea has not had enough oxygen throughout the night and and hence it is now oedematous or swollen and not the crystal clear tissue it ought to be. There may also be a destruction of the epithelium or covering of the cornea which is responsible for the redness and intense glare in light. Fortunately, a single episode , most often , clears with treatment. You have to use lubricating eye drops like Refresh tears or a stronger gel version like Refresh liquigel in the right eye 4 times a day. Also, if there is corneal oedema, a hyperosmotic drop like Hypersol eye drops also with the same frequency helps. Use a lubricating eye ointment at bedtime for a few days as well. Do not use your contact lens for a couple of days. That s how long the problem takes to resolve. If vision deteriorates or redness increases, visit your ophthalmologist. However, if all abates, as it usually does, resume use of lenses as usual but refrain from ever wearing lenses while sleeping to prevent a recurrence of a similar episode.